Verified the NVIDIA suppression locally; assuming the AMD suppression
will take effect on the bot. Thanks to geofflang@ and cwallez@ for the
suggestion on the approach to take.

BUG=angleproject:892

Change-Id: Ida4b6c1395185b0dfb0ea890395e35cb6db7ccd5
Reviewed-on: https://chromium-review.googlesource.com/283974Tested-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>